US5235085AExpiredUtility

Process for forming bis(pentaerythritol phosphate) carbonate

62
Assignee: AKZO NVPriority: Jul 10, 1992Filed: Jul 10, 1992Granted: Aug 10, 1993
Est. expiryJul 10, 2012(expired)· nominal 20-yr term from priority
Inventors:Jeffrey E. TelschowEdward D. Weil
C07F 9/65748
62
PatentIndex Score
8
Cited by
10
References
20
Claims

Abstract

Bis(pentaerythritol phosphate) carbonate can be formed by the reaction of pentaerythritol phosphate alcohol and dihydrocarbyl carbonate, such as diphenyl carbonate, preferably in the presence of a transesterification catalyst, such as an imidazole, and in a high boiling organic solvent, e.g., a phosphate ester solvent, which allows for removal of by-product.

Claims

exact text as granted — not AI-modified
We claim: 
     
       1. A process for forming bis(pentaerythritol phosphate) carbonate which comprises the reaction of pentaerythritol phosphate alcohol and dihydrocarbyl carbonate. 
     
     
       2. A process as claimed in claim 1 wherein the reaction is carried out in the presence of a transesterification catalyst. 
     
     
       3. A process as claimed in claim 2 wherein the catalyst is an imidazole compound. 
     
     
       4. A process as claimed in claim 1 wherein the reaction is performed in an aryl phosphate ester solvent. 
     
     
       5. A process as claimed in claim 4 wherein the reaction is carried out in the solvent in the presence of a transesterification catalyst. 
     
     
       6. A process as claimed in claim 5 wherein the catalyst is an imidazole compound. 
     
     
       7. A process as claimed in claim 1 wherein the molar ratio of pentaerythritol phosphate to dihydrocarbyl carbonate is from about 1.5:1 to about 3:1. 
     
     
       8. A process as claimed in claim 7 wherein the reaction is carried out in the presence of a transesterification catalyst selected from the group consisting of an alkali metal salt of a phenol and an imidazole compound and in an aryl phosphate ester solvent. 
     
     
       9. A process as claimed in claim 8 wherein the catalyst is an imidazole compound. 
     
     
       10. A process as claimed in claim 7 wherein the temperature of reaction is from about 150° C. to about 250° C. 
     
     
       11. A process for forming bis(pentaerythritol phosphate) carbonate which comprises the reaction of pentaerythritol phosphate alcohol and diphenyl carbonate. 
     
     
       12. A process as claimed in claim 11 wherein the reaction is carried out in the presence o a transesterification catalyst. 
     
     
       13. A process as claimed in claim 12 wherein the catalyst is an imidazole compound. 
     
     
       14. A process as claimed in claim 11 wherein the reaction is performed in an aryl phosphate ester solvent. 
     
     
       15. A process as claimed in claim 14 wherein the reaction is carried out in solvent in the presence of a transesterification catalyst selected from the group consisting of an alkali metal salt of a phenol and an imidazole compound. 
     
     
       16. A process as claimed in claim 15 wherein the catalyst is an imidazole compound. 
     
     
       17. A process as claimed in claim 11 wherein the molar ratio of pentaerythritol phosphate to diphenyl carbonate is from about 1.5:1 to about 3:1. 
     
     
       18. A process as claimed in claim 17 wherein the reaction is carried out in the presence of a transesterification catalyst and in an aryl phosphate ester solvent. 
     
     
       19. A process as claimed in claim 18 wherein the catalyst is an imidazole compound. 
     
     
       20. A process as claimed in claim 17 wherein the temperature of reaction is from about 150° C. to about 250° C.

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